Knitted fabric



B. PFROMMER 1,722,391

KNITTED FABRIC Filed Feb. 16) 1924 2l sheets-sheet 1 July 30, 1929.

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Brano P/'ommer Jllyf, 1929. B, PFROMMER A 1,722,391

KNITTED FABRIC Filed Feb-16 1924 2 Sheets-Sheet 2 g M., 4 c

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, da@ n Patented July 30, 1929.

UNITED STATES PATENT` OFFICE.

BRUNO PFROMMER, F IREUTLINGEN, GERMANY.

KNITTED Fannie.

Application led February 16, 1924, Serial No. 693,295,v and in Germany February 23, 1928.

My invention refers to knitted fabrics and more especiall to a new kind of plated twoply knitted fabric, to a process for manufacturing such article and also to the means for carrylng out this process.

The new fabric is particularly close and durable and is distorted less easily than other kinds of knitted materials. It is a doublefaced fabric showing a uniformly smooth sur- I face on both sides. It can be c'ut up in any desired manner and 'does not twine at the edges. If in the ground threads, threads of a different material, different quality or different color are plated, not only costly material can be saved, but a number of peculiar effects can be obtained, for instance in woolen fabrics the felting can be avoided by embedding not-felting threads in the meshes of the wool threads. Furthermore, dierent color effects can be obtained on the-two sides of the fabric, as well as the so-called shining through or watering, The napping of the fabric and also the fulling with cloth-like fabrics can be carried outv more advantageously. In every case, the fabric will remain stronger, both in napping and in fulling, than other knitted fabric, inasmuch as the plated meshes which support the meshes of the ground are covered by these latter and are not attacked.

In the drawings alixed to this specification and formin' part thereof, my invention is illustrated dgiagrammatically by way of example. In the drawings Fig. 1 shows the new fabric in the course of manufacture, while Fior. 2 is a diagrammatic cross section of the fabric and the needles and Fig. 3 is a diagrammatic plan view of the o fabric, all of them drawn to a larger scale.

Fig. 4 is a plan view, drawn also to a larger scale, of the essential parts of a knitting machine adapted for producing the new fabric and v Fig. 5 is a section on the line A-B in Fig. 4.

Referring to the drawings, the fabric is shown to be composed of three threads, the ground thread a and the plated-in threads b and c. The ground thread a which is converted on the two rows of'needles into a twoply ground fabric, emerges on the two surfaces and imparts to the fabric its peculiar character. The lating threads b and c are formed into meslles with the ground thread a: one-sidedly on each side of the ground fabric, so that on each row of needles a ground mesh and a plated mesh are arranged to form double meshes. The plated meshes b, c which are arranged inside on each surface of the fabric serve as a filling, binding and as a support againstv an yunnecessary stretching in the longitudinal and transverse direction. -This new fabric, which is at the same time soft and full, .constitutes an intermediate link between the woven unelastic fabrics and the knitted elastic fabrics.

Different colors are obtained on the two sides of the fabric by employing a thread b of different color than thread c, these two colors being adapted to the ground color of thread a. There is thus obtained a colored shining shade having a so-called reciprocal effect. In this manner three colors can be worked into plated two-ply fabric, whereby a different shade will appear on either side of the fabric.

In the knitting machine, the essential parts of which are illustrated in Figs. 4 and 5, the needles n, fn. are controlledas usual at their heels f, f by the cam box, the single parts of which are marked I-VIII and which rotate in the direction of the arrow. fn is here assumed to be the front row and n the rear row of needles. The middle portions V, VI of the cam box push the needles into their -uppermost positions 4 and 7, respectively. The upper parts VII, VIII then pull the needles fn, n intol half-level 5--8, where the needles attain their position of insertion. The thread guide 1, which is of the usual kind, now inserts its threads a in the hooks of the needles n, n which grip the thread and pull -it in order to work it into a row of rib meshes. Besides the thread guide 1 running above and 95 between the needles, there are provided further thread guides 2 and 3 which are running with it, however below the projecting needles, and which vseparately insert their threads b, c about one half division later in 100 the row of needles across which they are travelling.

By this peculiar position of the thread guides, each of the plating threads b, c is inserted one-sidedly in the needle at the side of 105 the ground thread a gripped on both sides and are worked together with it by the cam box parts II and III at the place of sinking 6, 9 into meshes.

During this process the natural movements 110 of the needles on the one hand and the rear portions of the needles on the other hand are utilized for securely inserting the threads b, c. For, in carrying the needles back, the latches c, a are folded in a`well known manner by the old meshes against the needle hooks and, while this is being done, the threads b, c are completely inserted in the hooks and, at the same time, are conducted by the needles which are disposed opposite for the time being at the lower edges of their shafts, so that an escaping of the threads b, c from thehooks and, in consequence thereof, an uncertaln formation of meshes is absolutely avoided. This secure mode of inserting the threads can'be clearly seen from Fig. 5 in connection wlth thread guide 3, intermediate tooth d, and needle 4. The knock-over comb, the teeth of which are marked d and e provides for the safe producing and knocking-over of the plating meshes.

The three-thread knitting machine allows changing over to another knitting method after 'the thread guides 2 and 3 have been rendered inoperative and thread guide 1 has been changed over, sc that without any loss of time a double rib, royal rib and rlbbed fabrics can be made. In the same manner the additional thread guides 2 and 3 can be exchanged in order to obtain a different color effect.

I wish it to be understood that I do not desire to be limited to the exact details of construction or operation shown and described, for obvious modifications will occur to a person skilled in the art.

1. As a new article of manufacture, a compound fabric comprising two plain fabric structures and a thread drawn intojrib loops to form a rib fabric plating over the loop's of said plain fabrics.

2. As a new article of manufacture, a compound fabric comprising two plain fabric structures and a thread drawn into rib loops to form a rib fabric plating over the loopsof -said plain fabrics, said thread consisting of almaterial differing from the matrial form ing said plain fabrics. v-

5. As a new article of manufact-ure,` a compound fabric comprising two plain fabric structures formed of different materials and a thread drawn into `rib loops to form a rib fabric plating over the loops of said plain fabrics, said thread consisting of a material differing from the materials forming said plain fabrics.

6. As a new article of manufacture, a compound fabric comprising two plain fabric structures formed of diderently coloured materials and a thread drawn into rib loops to form a rib fabric plating over the loops of said plain fabrics.

7. As a new article of manufacture, a compound fabric comprising two plain fabric structures formed of differently coloured materials and a thread drawn into rib loops to form a rib fabric plating over the loops of said plain fabrics, said thread consisting of a material differing from the materials forming said plain fabrics.

8. As a new article of manufacture, a compound fabric comprising two plain fabric structures formed of differently coloured materials and a thread drawn into rib loops to form a rib fabric plating over the loops of said plain fabrics, said thread consisting of a material differing in colour from the materials forming said plain fabrics.

In testimony whereof Iaix my signature.

BRUNO PFROMMER. 

